ATMEGA164P-20PU Atmel, ATMEGA164P-20PU Datasheet - Page 155
ATMEGA164P-20PU
Manufacturer Part Number
ATMEGA164P-20PU
Description
IC MCU AVR 16K FLASH 40-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA164P-20PU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Processor Series
ATMEGA16x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
2-Wire/JTAG/SPI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Controller Family/series
AVR MEGA
No. Of I/o's
32
Eeprom Memory Size
512Byte
Ram Memory Size
1KB
Cpu Speed
20MHz
Rohs Compliant
Yes
For Use With
ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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14.11.2
8011O–AVR–07/10
TCCR2B – Timer/Counter Control Register B
• Bits 1:0 – WGM21:0: Waveform Generation Mode
Combined with the WGM22 bit found in the TCCR2B Register, these bits control the counting
sequence of the counter, the source for maximum (TOP) counter value, and what type of wave-
form generation to be used, see
unit are: Normal mode (counter), Clear Timer on Compare Match (CTC) mode, and two types of
Pulse Width Modulation (PWM) modes (see
Table 14-8.
Notes:
• Bit 7 – FOC2A: Force Output Compare A
The FOC2A bit is only active when the WGM bits specify a non-PWM mode.
However, for ensuring compatibility with future devices, this bit must be set to zero when
TCCR2B is written when operating in PWM mode. When writing a logical one to the FOC2A bit,
an immediate Compare Match is forced on the Waveform Generation unit. The OC2A output is
changed according to its COM2A1:0 bits setting. Note that the FOC2A bit is implemented as a
strobe. Therefore it is the value present in the COM2A1:0 bits that determines the effect of the
forced compare.
A FOC2A strobe will not generate any interrupt, nor will it clear the timer in CTC mode using
OCR2A as TOP.
The FOC2A bit is always read as zero.
Bit
(0xB1)
Read/Write
Initial Value
Mode
0
1
2
3
4
5
6
7
1. MAX= 0xFF
2. BOTTOM= 0x00
WGM2
0
0
0
0
1
1
1
1
Waveform Generation Mode Bit Description
FOC2A
W
7
0
WGM1
0
0
1
1
0
0
1
1
FOC2B
W
6
0
WGM0
Table
0
1
0
1
0
1
0
1
R
5
–
0
14-8. Modes of operation supported by the Timer/Counter
Timer/Counter
Mode of
Operation
Normal
PWM, Phase
Correct
CTC
Fast PWM
Reserved
PWM, Phase
Correct
Reserved
Fast PWM
”Modes of Operation” on page
R
4
–
0
ATmega164P/324P/644P
WGM22
R/W
3
0
OCRA
OCRA
OCRA
0xFF
0xFF
0xFF
TOP
CS22
–
–
R/W
2
0
Update of
Immediate
Immediate
BOTTOM
BOTTOM
OCRx at
CS21
R/W
1
0
TOP
TOP
–
–
144).
CS20
R/W
0
0
Set on
TOV Flag
BOTTOM
BOTTOM
MAX
MAX
MAX
TOP
TCCR2B
–
–
(1)(2)
155
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